Related Party Transactions - Schedule of Significant Transactions with Related Parties (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Balance Sheet
Accounts and notes receivable	$ 7,050		$ 5,813
Accounts payable	7,017		6,218
Income Statement
Operating revenues and other income	16,054	$ 17,101
Purchased commodities	6,283	6,188
Production and operating expenses and selling, general and administrative expenses	193	191
Related Party
Balance Sheet
Accounts and notes receivable	74		79
Accounts payable	51		$ 64
Income Statement
Operating revenues and other income	11	24
Purchased commodities	(3)	2
Production and operating expenses and selling, general and administrative expenses	$ 45	$ 85

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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